What potential issue could arise when trying to pass an array with values through a session in PHP?

When trying to pass an array with values through a session in PHP, the potential issue that could arise is that not all data types can be serialized and stored in a session. To solve this issue, you can serialize the array before storing it in the session and then unserialize it when retrieving it. 

// Serialize the array before storing it in the session
$array = [1, 2, 3, 'example'];
$_SESSION['array'] = serialize($array);

// Unserialize the array when retrieving it from the session
$array = unserialize($_SESSION['array']);
print_r($array);

Keywords

array session serialization unserialize data loss

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